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NFS client updates for Linux 3.20

Browse Source 
Highlights include:
 
 - Fix a use-after-free in decode_cb_sequence_args()
 - Fix a compile error when #undef CONFIG_PROC_FS
 - NFSv4.1 backchannel spinlocking issue
 - Cleanups in the NFS unstable write code requested by Linus
 - NFSv4.1 fix issues when the server denies our backchannel request
 - Cleanups in create_session and bind_conn_to_session
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Merge tag 'nfs-for-3.20-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull more NFS client updates from Trond Myklebust:
 "Highlights include:

   - Fix a use-after-free in decode_cb_sequence_args()
   - Fix a compile error when #undef CONFIG_PROC_FS
   - NFSv4.1 backchannel spinlocking issue
   - Cleanups in the NFS unstable write code requested by Linus
   - NFSv4.1 fix issues when the server denies our backchannel request
   - Cleanups in create_session and bind_conn_to_session"

* tag 'nfs-for-3.20-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4.1: Clean up bind_conn_to_session
  NFSv4.1: Always set up a forward channel when binding the session
  NFSv4.1: Don't set up a backchannel if the server didn't agree to do so
  NFSv4.1: Clean up create_session
  pnfs: Refactor the *_layout_mark_request_commit to use pnfs_layout_mark_request_commit
  NFSv4: Kill unused nfs_inode->delegation_state field
  NFS: struct nfs_commit_info.lock must always point to inode->i_lock
  nfs: Can call nfs_clear_page_commit() instead
  nfs: Provide and use helper functions for marking a page as unstable
  SUNRPC: Always manipulate rpc_rqst::rq_bc_pa_list under xprt->bc_pa_lock
  SUNRPC: Fix a compile error when #undef CONFIG_PROC_FS
  NFSv4.1: Convert open-coded array allocation calls to kmalloc_array()
  NFSv4.1: Fix a kfree() of uninitialised pointers in decode_cb_sequence_args
This commit is contained in:
Linus Torvalds 2015-02-21 14:02:59 -08:00
commit 24a52e412e
19 changed files with 165 additions and 158 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/nfs/callback_proc.c
View File

@ -427,6 +427,8 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
if (clp == NULL)
goto out;
if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
goto out;
tbl = &clp->cl_session->bc_slot_table;
spin_lock(&tbl->slot_tbl_lock);

8
fs/nfs/callback_xdr.c
View File

@ -313,7 +313,7 @@ __be32 decode_devicenotify_args(struct svc_rqst *rqstp,
goto out;
}
args->devs = kmalloc(n * sizeof(*args->devs), GFP_KERNEL);
args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL);
if (!args->devs) {
status = htonl(NFS4ERR_DELAY);
goto out;
@ -415,7 +415,7 @@ static __be32 decode_rc_list(struct xdr_stream *xdr,
rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t));
if (unlikely(p == NULL))
goto out;
rc_list->rcl_refcalls = kmalloc(rc_list->rcl_nrefcalls *
rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls,
sizeof(*rc_list->rcl_refcalls),
GFP_KERNEL);
if (unlikely(rc_list->rcl_refcalls == NULL))
@ -464,8 +464,10 @@ static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp,
for (i = 0; i < args->csa_nrclists; i++) {
status = decode_rc_list(xdr, &args->csa_rclists[i]);
if (status)
if (status) {
args->csa_nrclists = i;
goto out_free;
}
}
}
status = 0;

4
fs/nfs/delegation.c
View File

@ -180,7 +180,6 @@ void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred,
delegation->cred = get_rpccred(cred);
clear_bit(NFS_DELEGATION_NEED_RECLAIM,
&delegation->flags);
NFS_I(inode)->delegation_state = delegation->type;
spin_unlock(&delegation->lock);
put_rpccred(oldcred);
rcu_read_unlock();
@ -275,7 +274,6 @@ nfs_detach_delegation_locked(struct nfs_inode *nfsi,
set_bit(NFS_DELEGATION_RETURNING, &delegation->flags);
list_del_rcu(&delegation->super_list);
delegation->inode = NULL;
nfsi->delegation_state = 0;
rcu_assign_pointer(nfsi->delegation, NULL);
spin_unlock(&delegation->lock);
return delegation;
@ -355,7 +353,6 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
&delegation->stateid)) {
nfs_update_inplace_delegation(old_delegation,
delegation);
nfsi->delegation_state = old_delegation->type;
goto out;
}
/*
@ -379,7 +376,6 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
goto out;
}
list_add_rcu(&delegation->super_list, &server->delegations);
nfsi->delegation_state = delegation->type;
rcu_assign_pointer(nfsi->delegation, delegation);
delegation = NULL;

2
fs/nfs/direct.c
View File

@ -283,7 +283,7 @@ static void nfs_direct_release_pages(struct page **pages, unsigned int npages)
void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
struct nfs_direct_req *dreq)
{
cinfo->lock = &dreq->lock;
cinfo->lock = &dreq->inode->i_lock;
cinfo->mds = &dreq->mds_cinfo;
cinfo->ds = &dreq->ds_cinfo;
cinfo->dreq = dreq;

53
fs/nfs/filelayout/filelayout.c
View File

@ -960,52 +960,19 @@ filelayout_mark_request_commit(struct nfs_page *req,
{
struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
u32 i, j;
struct list_head *list;
struct pnfs_commit_bucket *buckets;
if (fl->commit_through_mds) {
list = &cinfo->mds->list;
spin_lock(cinfo->lock);
goto mds_commit;
}
/* Note that we are calling nfs4_fl_calc_j_index on each page
* that ends up being committed to a data server. An attractive
* alternative is to add a field to nfs_write_data and nfs_page
* to store the value calculated in filelayout_write_pagelist
* and just use that here.
*/
j = nfs4_fl_calc_j_index(lseg, req_offset(req));
i = select_bucket_index(fl, j);
spin_lock(cinfo->lock);
buckets = cinfo->ds->buckets;
list = &buckets[i].written;
if (list_empty(list)) {
/* Non-empty buckets hold a reference on the lseg. That ref
* is normally transferred to the COMMIT call and released
* there. It could also be released if the last req is pulled
* off due to a rewrite, in which case it will be done in
* pnfs_generic_clear_request_commit
nfs_request_add_commit_list(req, &cinfo->mds->list, cinfo);
} else {
/* Note that we are calling nfs4_fl_calc_j_index on each page
* that ends up being committed to a data server. An attractive
* alternative is to add a field to nfs_write_data and nfs_page
* to store the value calculated in filelayout_write_pagelist
* and just use that here.
*/
buckets[i].wlseg = pnfs_get_lseg(lseg);
}
set_bit(PG_COMMIT_TO_DS, &req->wb_flags);
cinfo->ds->nwritten++;
mds_commit:
/* nfs_request_add_commit_list(). We need to add req to list without
* dropping cinfo lock.
*/
set_bit(PG_CLEAN, &(req)->wb_flags);
nfs_list_add_request(req, list);
cinfo->mds->ncommit++;
spin_unlock(cinfo->lock);
if (!cinfo->dreq) {
inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
inc_bdi_stat(inode_to_bdi(page_file_mapping(req->wb_page)->host),
BDI_RECLAIMABLE);
__mark_inode_dirty(req->wb_context->dentry->d_inode,
I_DIRTY_DATASYNC);
j = nfs4_fl_calc_j_index(lseg, req_offset(req));
i = select_bucket_index(fl, j);
pnfs_layout_mark_request_commit(req, lseg, cinfo, i);
}
}

43
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -1332,47 +1332,6 @@ ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
return PNFS_ATTEMPTED;
}
static void
ff_layout_mark_request_commit(struct nfs_page *req,
struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo,
u32 ds_commit_idx)
{
struct list_head *list;
struct pnfs_commit_bucket *buckets;
spin_lock(cinfo->lock);
buckets = cinfo->ds->buckets;
list = &buckets[ds_commit_idx].written;
if (list_empty(list)) {
/* Non-empty buckets hold a reference on the lseg. That ref
* is normally transferred to the COMMIT call and released
* there. It could also be released if the last req is pulled
* off due to a rewrite, in which case it will be done in
* pnfs_common_clear_request_commit
*/
WARN_ON_ONCE(buckets[ds_commit_idx].wlseg != NULL);
buckets[ds_commit_idx].wlseg = pnfs_get_lseg(lseg);
}
set_bit(PG_COMMIT_TO_DS, &req->wb_flags);
cinfo->ds->nwritten++;
/* nfs_request_add_commit_list(). We need to add req to list without
* dropping cinfo lock.
*/
set_bit(PG_CLEAN, &(req)->wb_flags);
nfs_list_add_request(req, list);
cinfo->mds->ncommit++;
spin_unlock(cinfo->lock);
if (!cinfo->dreq) {
inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
inc_bdi_stat(inode_to_bdi(page_file_mapping(req->wb_page)->host),
BDI_RECLAIMABLE);
__mark_inode_dirty(req->wb_context->dentry->d_inode,
I_DIRTY_DATASYNC);
}
}
static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
{
return i;
@ -1540,7 +1499,7 @@ static struct pnfs_layoutdriver_type flexfilelayout_type = {
.pg_write_ops = &ff_layout_pg_write_ops,
.get_ds_info = ff_layout_get_ds_info,
.free_deviceid_node = ff_layout_free_deveiceid_node,
.mark_request_commit = ff_layout_mark_request_commit,
.mark_request_commit = pnfs_layout_mark_request_commit,
.clear_request_commit = pnfs_generic_clear_request_commit,
.scan_commit_lists = pnfs_generic_scan_commit_lists,
.recover_commit_reqs = pnfs_generic_recover_commit_reqs,

1
fs/nfs/inode.c
View File

@ -1775,7 +1775,6 @@ static inline void nfs4_init_once(struct nfs_inode *nfsi)
#if IS_ENABLED(CONFIG_NFS_V4)
INIT_LIST_HEAD(&nfsi->open_states);
nfsi->delegation = NULL;
nfsi->delegation_state = 0;
init_rwsem(&nfsi->rwsem);
nfsi->layout = NULL;
#endif

13
fs/nfs/internal.h
View File

@ -597,6 +597,19 @@ void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
sb->s_maxbytes = MAX_LFS_FILESIZE;
}
/*
* Record the page as unstable and mark its inode as dirty.
*/
static inline
void nfs_mark_page_unstable(struct page *page)
{
struct inode *inode = page_file_mapping(page)->host;
inc_zone_page_state(page, NR_UNSTABLE_NFS);
inc_bdi_stat(inode_to_bdi(inode), BDI_RECLAIMABLE);
__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
}
/*
* Determine the number of bytes of data the page contains
*/

75
fs/nfs/nfs4proc.c
View File

@ -6648,47 +6648,47 @@ nfs41_same_server_scope(struct nfs41_server_scope *a,
int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
{
int status;
struct nfs41_bind_conn_to_session_args args = {
.client = clp,
.dir = NFS4_CDFC4_FORE_OR_BOTH,
};
struct nfs41_bind_conn_to_session_res res;
struct rpc_message msg = {
.rpc_proc =
&nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
.rpc_argp = clp,
.rpc_argp = &args,
.rpc_resp = &res,
.rpc_cred = cred,
};
dprintk("--> %s\n", __func__);
res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
if (unlikely(res.session == NULL)) {
status = -ENOMEM;
goto out;
}
nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
args.dir = NFS4_CDFC4_FORE;
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
trace_nfs4_bind_conn_to_session(clp, status);
if (status == 0) {
if (memcmp(res.session->sess_id.data,
if (memcmp(res.sessionid.data,
clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
dprintk("NFS: %s: Session ID mismatch\n", __func__);
status = -EIO;
goto out_session;
goto out;
}
if (res.dir != NFS4_CDFS4_BOTH) {
if ((res.dir & args.dir) != res.dir || res.dir == 0) {
dprintk("NFS: %s: Unexpected direction from server\n",
__func__);
status = -EIO;
goto out_session;
goto out;
}
if (res.use_conn_in_rdma_mode) {
if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
dprintk("NFS: %s: Server returned RDMA mode = true\n",
__func__);
status = -EIO;
goto out_session;
goto out;
}
}
out_session:
kfree(res.session);
out:
dprintk("<-- %s status= %d\n", __func__, status);
return status;
@ -7166,10 +7166,11 @@ static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
args->bc_attrs.max_reqs);
}
static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
struct nfs41_create_session_res *res)
{
struct nfs4_channel_attrs *sent = &args->fc_attrs;
struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
if (rcvd->max_resp_sz > sent->max_resp_sz)
return -EINVAL;
@ -7188,11 +7189,14 @@ static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args
return 0;
}
static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
struct nfs41_create_session_res *res)
{
struct nfs4_channel_attrs *sent = &args->bc_attrs;
struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
if (!(res->flags & SESSION4_BACK_CHAN))
goto out;
if (rcvd->max_rqst_sz > sent->max_rqst_sz)
return -EINVAL;
if (rcvd->max_resp_sz < sent->max_resp_sz)
@ -7204,18 +7208,30 @@ static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args
return -EINVAL;
if (rcvd->max_reqs != sent->max_reqs)
return -EINVAL;
out:
return 0;
}
static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
struct nfs4_session *session)
struct nfs41_create_session_res *res)
{
int ret;
ret = nfs4_verify_fore_channel_attrs(args, session);
ret = nfs4_verify_fore_channel_attrs(args, res);
if (ret)
return ret;
return nfs4_verify_back_channel_attrs(args, session);
return nfs4_verify_back_channel_attrs(args, res);
}
static void nfs4_update_session(struct nfs4_session *session,
struct nfs41_create_session_res *res)
{
nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
session->flags = res->flags;
memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
if (res->flags & SESSION4_BACK_CHAN)
memcpy(&session->bc_attrs, &res->bc_attrs,
sizeof(session->bc_attrs));
}
static int _nfs4_proc_create_session(struct nfs_client *clp,
@ -7224,11 +7240,12 @@ static int _nfs4_proc_create_session(struct nfs_client *clp,
struct nfs4_session *session = clp->cl_session;
struct nfs41_create_session_args args = {
.client = clp,
.clientid = clp->cl_clientid,
.seqid = clp->cl_seqid,
.cb_program = NFS4_CALLBACK,
};
struct nfs41_create_session_res res = {
.client = clp,
};
struct nfs41_create_session_res res;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
.rpc_argp = &args,
@ -7245,11 +7262,15 @@ static int _nfs4_proc_create_session(struct nfs_client *clp,
if (!status) {
/* Verify the session's negotiated channel_attrs values */
status = nfs4_verify_channel_attrs(&args, session);
status = nfs4_verify_channel_attrs(&args, &res);
/* Increment the clientid slot sequence id */
clp->cl_seqid++;
if (clp->cl_seqid == res.seqid)
clp->cl_seqid++;
if (status)
goto out;
nfs4_update_session(session, &res);
}
out:
return status;
}

2
fs/nfs/nfs4session.c
View File

@ -450,7 +450,7 @@ int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
tbl = &ses->fc_slot_table;
tbl->session = ses;
status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
if (status) /* -ENOMEM */
if (status || !(ses->flags & SESSION4_BACK_CHAN)) /* -ENOMEM */
return status;
/* Back channel */
tbl = &ses->bc_slot_table;

6
fs/nfs/nfs4session.h
View File

@ -118,6 +118,12 @@ static inline int nfs4_has_persistent_session(const struct nfs_client *clp)
return 0;
}
static inline void nfs4_copy_sessionid(struct nfs4_sessionid *dst,
const struct nfs4_sessionid *src)
{
memcpy(dst->data, src->data, NFS4_MAX_SESSIONID_LEN);
}
#ifdef CONFIG_CRC32
/*
* nfs_session_id_hash - calculate the crc32 hash for the session id

32
fs/nfs/nfs4xdr.c
View File

@ -1715,17 +1715,17 @@ static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, stru
#if defined(CONFIG_NFS_V4_1)
/* NFSv4.1 operations */
static void encode_bind_conn_to_session(struct xdr_stream *xdr,
struct nfs4_session *session,
struct nfs41_bind_conn_to_session_args *args,
struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
decode_bind_conn_to_session_maxsz, hdr);
encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
p = xdr_reserve_space(xdr, 8);
*p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
*p = 0; /* use_conn_in_rdma_mode = False */
*p++ = cpu_to_be32(args->dir);
*p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
}
static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
@ -1806,8 +1806,8 @@ static void encode_create_session(struct xdr_stream *xdr,
encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
p = xdr_encode_hyper(p, clp->cl_clientid);
*p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
p = xdr_encode_hyper(p, args->clientid);
*p++ = cpu_to_be32(args->seqid); /*Sequence id */
*p++ = cpu_to_be32(args->flags); /*flags */
/* Fore Channel */
@ -2734,14 +2734,14 @@ static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
*/
static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs_client *clp)
struct nfs41_bind_conn_to_session_args *args)
{
struct compound_hdr hdr = {
.minorversion = clp->cl_mvops->minor_version,
.minorversion = args->client->cl_mvops->minor_version,
};
encode_compound_hdr(xdr, req, &hdr);
encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
encode_bind_conn_to_session(xdr, args, &hdr);
encode_nops(&hdr);
}
@ -5613,7 +5613,7 @@ static int decode_bind_conn_to_session(struct xdr_stream *xdr,
status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
if (!status)
status = decode_sessionid(xdr, &res->session->sess_id);
status = decode_sessionid(xdr, &res->sessionid);
if (unlikely(status))
return status;
@ -5641,12 +5641,10 @@ static int decode_create_session(struct xdr_stream *xdr,
{
__be32 *p;
int status;
struct nfs_client *clp = res->client;
struct nfs4_session *session = clp->cl_session;
status = decode_op_hdr(xdr, OP_CREATE_SESSION);
if (!status)
status = decode_sessionid(xdr, &session->sess_id);
status = decode_sessionid(xdr, &res->sessionid);
if (unlikely(status))
return status;
@ -5654,13 +5652,13 @@ static int decode_create_session(struct xdr_stream *xdr,
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
clp->cl_seqid = be32_to_cpup(p++);
session->flags = be32_to_cpup(p);
res->seqid = be32_to_cpup(p++);
res->flags = be32_to_cpup(p);
/* Channel attributes */
status = decode_chan_attrs(xdr, &session->fc_attrs);
status = decode_chan_attrs(xdr, &res->fc_attrs);
if (!status)
status = decode_chan_attrs(xdr, &session->bc_attrs);
status = decode_chan_attrs(xdr, &res->bc_attrs);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);

4
fs/nfs/pnfs.h
View File

@ -344,6 +344,10 @@ void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
struct xdr_stream *xdr,
gfp_t gfp_flags);
void pnfs_layout_mark_request_commit(struct nfs_page *req,
struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo,
u32 ds_commit_idx);
static inline bool nfs_have_layout(struct inode *inode)
{

30
fs/nfs/pnfs_nfs.c
View File

@ -838,3 +838,33 @@ out_err:
return NULL;
}
EXPORT_SYMBOL_GPL(nfs4_decode_mp_ds_addr);
void
pnfs_layout_mark_request_commit(struct nfs_page *req,
struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo,
u32 ds_commit_idx)
{
struct list_head *list;
struct pnfs_commit_bucket *buckets;
spin_lock(cinfo->lock);
buckets = cinfo->ds->buckets;
list = &buckets[ds_commit_idx].written;
if (list_empty(list)) {
/* Non-empty buckets hold a reference on the lseg. That ref
* is normally transferred to the COMMIT call and released
* there. It could also be released if the last req is pulled
* off due to a rewrite, in which case it will be done in
* pnfs_common_clear_request_commit
*/
WARN_ON_ONCE(buckets[ds_commit_idx].wlseg != NULL);
buckets[ds_commit_idx].wlseg = pnfs_get_lseg(lseg);
}
set_bit(PG_COMMIT_TO_DS, &req->wb_flags);
cinfo->ds->nwritten++;
spin_unlock(cinfo->lock);
nfs_request_add_commit_list(req, list, cinfo);
}
EXPORT_SYMBOL_GPL(pnfs_layout_mark_request_commit);

16
fs/nfs/write.c
View File

@ -789,13 +789,8 @@ nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
nfs_list_add_request(req, dst);
cinfo->mds->ncommit++;
spin_unlock(cinfo->lock);
if (!cinfo->dreq) {
inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
inc_bdi_stat(inode_to_bdi(page_file_mapping(req->wb_page)->host),
BDI_RECLAIMABLE);
__mark_inode_dirty(req->wb_context->dentry->d_inode,
I_DIRTY_DATASYNC);
}
if (!cinfo->dreq)
nfs_mark_page_unstable(req->wb_page);
}
EXPORT_SYMBOL_GPL(nfs_request_add_commit_list);
@ -1605,11 +1600,8 @@ void nfs_retry_commit(struct list_head *page_list,
req = nfs_list_entry(page_list->next);
nfs_list_remove_request(req);
nfs_mark_request_commit(req, lseg, cinfo, ds_commit_idx);
if (!cinfo->dreq) {
dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
dec_bdi_stat(inode_to_bdi(page_file_mapping(req->wb_page)->host),
BDI_RECLAIMABLE);
}
if (!cinfo->dreq)
nfs_clear_page_commit(req->wb_page);
nfs_unlock_and_release_request(req);
}
}

1
include/linux/nfs_fs.h
View File

@ -180,7 +180,6 @@ struct nfs_inode {
/* NFSv4 state */
struct list_head open_states;
struct nfs_delegation __rcu *delegation;
fmode_t delegation_state;
struct rw_semaphore rwsem;
/* pNFS layout information */

19
include/linux/nfs_xdr.h
View File

@ -1167,8 +1167,15 @@ struct nfs41_impl_id {
struct nfstime4 date;
};
struct nfs41_bind_conn_to_session_args {
struct nfs_client *client;
struct nfs4_sessionid sessionid;
u32 dir;
bool use_conn_in_rdma_mode;
};
struct nfs41_bind_conn_to_session_res {
struct nfs4_session *session;
struct nfs4_sessionid sessionid;
u32 dir;
bool use_conn_in_rdma_mode;
};
@ -1185,6 +1192,8 @@ struct nfs41_exchange_id_res {
struct nfs41_create_session_args {
struct nfs_client *client;
u64 clientid;
uint32_t seqid;
uint32_t flags;
uint32_t cb_program;
struct nfs4_channel_attrs fc_attrs; /* Fore Channel */
@ -1192,7 +1201,11 @@ struct nfs41_create_session_args {
};
struct nfs41_create_session_res {
struct nfs_client *client;
struct nfs4_sessionid sessionid;
uint32_t seqid;
uint32_t flags;
struct nfs4_channel_attrs fc_attrs; /* Fore Channel */
struct nfs4_channel_attrs bc_attrs; /* Back Channel */
};
struct nfs41_reclaim_complete_args {
@ -1351,7 +1364,7 @@ struct nfs_commit_completion_ops {
};
struct nfs_commit_info {
spinlock_t *lock;
spinlock_t *lock; /* inode->i_lock */
struct nfs_mds_commit_info *mds;
struct pnfs_ds_commit_info *ds;
struct nfs_direct_req *dreq; /* O_DIRECT request */

7
include/linux/sunrpc/metrics.h
View File

@ -89,8 +89,11 @@ void rpc_free_iostats(struct rpc_iostats *);
static inline struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) { return NULL; }
static inline void rpc_count_iostats(const struct rpc_task *task,
struct rpc_iostats *stats) {}
static inline void rpc_count_iostats_metrics(const struct rpc_task *,
struct rpc_iostats *) {}
static inline void rpc_count_iostats_metrics(const struct rpc_task *task,
struct rpc_iostats *stats)
{
}
static inline void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) {}
static inline void rpc_free_iostats(struct rpc_iostats *stats) {}

5
net/sunrpc/backchannel_rqst.c
View File

@ -309,12 +309,15 @@ void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied)
struct rpc_xprt *xprt = req->rq_xprt;
struct svc_serv *bc_serv = xprt->bc_serv;
spin_lock(&xprt->bc_pa_lock);
list_del(&req->rq_bc_pa_list);
spin_unlock(&xprt->bc_pa_lock);
req->rq_private_buf.len = copied;
set_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state);
dprintk("RPC: add callback request to list\n");
spin_lock(&bc_serv->sv_cb_lock);
list_del(&req->rq_bc_pa_list);
list_add(&req->rq_bc_list, &bc_serv->sv_cb_list);
wake_up(&bc_serv->sv_cb_waitq);
spin_unlock(&bc_serv->sv_cb_lock);